CVE-2026-79666 json
Ech0 before 4.4.3 Missing Authorization via dashboard log endpoints
published 2026-04-10 6 mo ago modified 2026-08-31 2 mo ago also GHSA-cp79-9mwr-wr49 , GO-2026-5328 , EUVD-2026-65448
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 32%
- public exploits
- 0
- none known
Summary
Ech0 before 4.4.3 fails to enforce administrator authorization on dashboard log endpoints, allowing any authenticated user to access system logs. Attackers with valid user sessions can query GET /api/system/logs and subscribe to SSE and WebSocket log streams to retrieve sensitive operational data including file paths, stack traces, and internal URLs.
Patch / fix
- go github.com/lin-snow/ech0 4.3.5
- lin-snow Ech0 4.4.3
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.39% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/lin-snow/Ech0/security/advisories/GHSA-cp79-9mwr-wr49 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 7.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N |
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| CNA | 4.0 | 7.1 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| GitHub | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/lin-snow/ech0 | <4.3.5 all versions |
4.3.5 |
Affected products
- lin-snow Ech0
Classification
- Weakness
-
- CWE-862 Missing Authorization
References
-
github.com
/lin-snow/Ech0/security/advisories/GHSA-cp79-9mwr-wr49
vendor-advisory, exploit, web, advisory
-
vulncheck.com
/advisories/ech0-before-missing-authorization-via-dashboard-log-endpoints
third-party-advisory
-
github.com
/lin-snow/Ech0
package
-
github.com
/lin-snow/Ech0/releases/tag/v4.3.5
web
Sources
- CVE List CVE-2026-79666
- GitHub Advisory GHSA-cp79-9mwr-wr49
- NVD CVE-2026-79666
- OSV GO-2026-5328
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.